Differences

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--- programming:c:lockf [2008/04/30 18:21] – created crustymonkey
+++ programming:c:lockf [2008/04/30 18:22] (current) – crustymonkey
@@ Line 4: / Line 4: @@
 ====== Why Use It? ======
 This is very helpful when running a cron job that might run long enough that it would "overlap" with the next cron run.  This will cause the overlapping instance to exit, alternatively after ''-t <seconds>'' timeout.
-====== Usage ======
-<code>
-$ lockf --help
-usage: lockf [-ks] [-t seconds] file command [arguments]
-</code>
-A typical call would be:
-<code>
-$ lockf -t 30 /tmp/mybinary.lock mybinary --arg=blah --arg2=blah2
-</code>
-This would create a lockfile, ''/tmp/mybinary.lock'', that would cause any more ''lockf'' calls with that file to fail.  The ''-t 30'' means that if lockf cannot obtain a lock after 30 seconds, it will exit.
 ====== Download ======
@@ Line 26: / Line 15: @@
 # make && make install
 </code>
+The above will install the binary in ''/usr/bin'' and the man page in ''/usr/share/man/man1''.  If you want something different, just modify the paths in the ''Makefile''.
+====== Usage ======
+<code>
+$ lockf --help
+usage: lockf [-ks] [-t seconds] file command [arguments]
+</code>
+A typical call would be:
+<code>
+$ lockf -t 30 /tmp/mybinary.lock mybinary --arg=blah --arg2=blah2
+</code>
+This would create a lockfile, ''/tmp/mybinary.lock'', that would cause any more ''lockf'' calls with that file to fail.  The ''-t 30'' means that if lockf cannot obtain a lock after 30 seconds, it will exit.